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Removal Procedure

Fig 1: View Of EVAP Canister Access Cover In Right Rear Wheelhouse

Courtesy of GENERAL MOTORS CORP.

Remove the right rear wheelhouse liner panel. Refer to Wheelhouse Liner Panel Replacement - Rear in Body Rear End.
Remove the EVAP canister access cover.
Disconnect the fuel tank pressure sensor electrical connector.
Remove the fuel tank pressure sensor by carefully prying the sensor out of the fuel tank with a screwdriver.